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Finding the Fourth Proportional to 342.09, 472.08 and 192.72

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Solution

The fourth proportional to 342.09, 472.08 and 192.72 is: 265.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.09 : 472.08 = 192.72 : x
  2. Step 2: Convert to fraction form
    342.09/472.08 = 192.72/x
  3. Step 3: Cross multiply
    342.09x = 472.08 × 192.72
  4. Step 4: Simplify right side
    342.09x = 90,979.26
  5. Step 5: Solve for x
    x = 90,979.26/342.09
  6. Step 6: Final answer
    x = 265.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.